@boxColor: #333;

.box {
  height: 200px;
  width: 200px;
  background: @boxColor;

  > div {
    float: left;
  }
}

.imgContainer{
  height: 72px;
  width: 72px;
  background-repeat: no-repeat;
}

.img1:extend(.imgContainer){
  background: url('./assets/icon/icon-1.png');
}
.img2:extend(.imgContainer){
  background: url('./assets/icon/icon-2.png');
}
.img3:extend(.imgContainer){
  background: url('./assets/icon/icon-3.png');
}
.img4:extend(.imgContainer){
  background: url('./assets/4.png');
}
